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Thats one reason some people notice effects more quickly than they do with oral supplements
Common side effects: Injection site discomfort Mild diarrhea Hot flashes Dizziness or itching Precautions: Avoid B12 injections if youre allergic to cobalt or have Lebers hereditary optic neuropathy
Vitamin B12 Deficiency in a 15-Year Old Boy Due to Mutations in the Intrinsic Factor Gene, GIF. British Journal of Haematology, vol
They understand that the medication works best as part of a comprehensive approach that includes nutrition, exercise, and behavioral changes
Since its primarily found in animal products, those following a vegan or vegetarian lifestyle must find alternative sources
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